package com.share.admin.config.security;

import com.share.admin.config.security.bean.MyAccessDeniedHandler;
import com.share.admin.config.security.bean.MyAuthenticationEntryPoint;
import com.share.admin.config.security.bean.MyPasswordEncoder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;


/**
 * 在SpringSecurity中，认证或授权出现异常会被ExceptionTranslationFilter捕获到，他会去判断是认证失败还是授权失败出现异常。
 * 如果是认证过程中出现异常，那么异常会被封装成AuthenticationException然后调用AuthenticationEntryPoint的方法对异常进行处理。
 * 如果是授权过程中出现异常，会被封装成AccessDeniedException然后调用AccessDeniedHandler的方法对异常进行处理。
 */

/**
 * spring security配置
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Value("${sys.no.login.urls}.split(',')")
    private String noLoginUrls[];

    //自定义用户认证逻辑
    @Autowired
    private MyUserDetailsService myUserDetailsService;

    //认证失败处理类
    @Autowired
    private MyAuthenticationEntryPoint myAuthenticationEntryPoint;

    //密码加解密
    @Autowired
    private MyPasswordEncoder myPasswordEncoder;

    //无权限访问处理类
    @Autowired
    private MyAccessDeniedHandler myAccessDeniedHandler;

    //登录拦截器
    @Autowired
    private TokenFilter tokenFilter;

    //认证管理器
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    //身份认证接口  ---  用户的账号和密码核对
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(myUserDetailsService).passwordEncoder(myPasswordEncoder);
    }

    //参考:https://blog.csdn.net/weixin_45647685/article/details/124439641

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭跨域检测
                .csrf().disable()

                // 不创建会话
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()

                //过滤请求---也就是不需要认证
                .authorizeRequests()

                //配置过来的
                .antMatchers(noLoginUrls).permitAll()

                .antMatchers("/actuator/**").permitAll()  //健康检查

                .antMatchers("/user/login").permitAll()   //登录接口

                .antMatchers(HttpMethod.GET, "/*.html", "/**/*.html", "/**/*.css", "/**/*.js", "/profile/**").permitAll()
                .antMatchers("/swagger-ui.html", "/swagger-resources/**", "/webjars/**", "/*/api-docs", "/druid/**").permitAll()

                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated().and()

                //异常处理
                .exceptionHandling()
                .authenticationEntryPoint(myAuthenticationEntryPoint)//认证失败
                .accessDeniedHandler(myAccessDeniedHandler)//无权限访问
                .and()

                //登录跳过
                .addFilterBefore(tokenFilter, UsernamePasswordAuthenticationFilter.class);
    }
}
